Question

which one of the following set of quantum numbers is not possible for an electron in the ground state of an atom with atomic number 19​

Answer 1

Answer:

electron affinity of nitrogen is lower(less negative ) than carbon. ... For many elements ,energy is released when an electron is added to the atom and therefore , electron gain enthalpy is negative. The magnitude of the electron gain enthalpy measures the ability of an atom to hold an additional electron .